Building extrusion



FIG. 1 is a front end view of a building extrusion, showing my new design;

FIG. 2 is a back end view thereof;

FIG. 3 is a right side elevational view thereof, shown rotated at a 90° angle counter-clockwise;

FIG. 4 is a left side elevational view thereof, shown rotated at a 90° angle counter-clockwise;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a magnified view of a circular portion identified in FIG. 5;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a perspective view thereof.

The building extrusion is shown with a symbolic break in its length. The appearance of any portion of the building extrusion between the break lines forms no part of the claimed design. The circle drawn in broken lines in FIG. 5 identifies the area shown magnified in FIG. 6. Neither of these circles forms any part of the claimed design. 

CLAIM The ornamental design for a building extrusion, as shown and described. 